In your life time, you'll face a lot of choices. Most of them are indifferent, and can't affect you. But there must be some ones which change your life and give your different fulture. It's called fateful choice. Such as marriage and career.
The wife or husband is one of most important person to you. He/she always supports you and carries you through the difficulties. After marriage, you'll find you grow up and become stronger. And you'll get more courage to face trouble and solve the difficult problem. But in the first, you should choose right person for marrage. It's so important that maybe affect whole your life.
Everyone has to work for survival and show your worth to society. So what kind of work you choose is another most important thing for you. At the beginning, you maybe not know what you true want. You'll try to do many jobs, learn more and more skills at the same time. About 5 years after graduation, you can realize the real society gradually and your target will be more and more clear. In this moment, you should face the key choice in your life, maybe it's the only one. So this decision is so significant that it'll guide you to different groups of people.
In a word, all of people in society have to make right decision for their fateful choice. If not, their life must be unsuccessful.